Zack Heikel buys on a whim an old abandoned mansion and after moving in, he stumbles upon an enormous vault hidden in a secret room in the basement. After using an acetylene torch to gain entry, he finds four million dollars in cash, along with journal records from illegal rackets in the Chicago and Detroit areas in the 1930's. More surprising was a jar of formaldehyde containing nine severed human fingers, three of which wore a very unusual silver signet ring. An ancient manuscript found among the rubble in an upstairs library explains the rings and also spoke of an order of men from biblical times calling themselves "The Knights of Zion." Zack spends years trying to find answers to these mysteries woven into the old mansion as well as why it was built the way it was and who is the old hunchback caretaker that still lives in a shack on the rear of the property.